feat(linux): portable build works on linux + benchmarks

tools/build_mfem_bundle.py

@@ -589,15 +589,7 @@ def build_zlib(
         build.mkdir(parents=True, exist_ok=True)
         cmake_configure(args, args.zlib_source, build, options, env)
         run(
-            [
-                args.cmake,
-                "--build",
-                build,
-                "--target",
-                "zlibstatic",
-                "--parallel",
-                str(args.jobs),
-            ],
+            [args.cmake, "--build", build, "--parallel", str(args.jobs)],
             env=env,
         )
         run([args.cmake, "--install", build], env=env)
@@ -658,7 +650,7 @@ def build_hypre(
     options = common_cmake_args(
         args,
         build_type,
-        c_compiler=mpicc if features["mpi"] else args.cc,
+        c_compiler=args.cc,
     ) + [
         f"-DHYPRE_ENABLE_MPI={'ON' if features['mpi'] else 'OFF'}",
         f"-DHYPRE_ENABLE_OPENMP={'ON' if features['openmp'] else 'OFF'}",
@@ -668,6 +660,12 @@ def build_hypre(
         "-DHYPRE_BUILD_EXAMPLES=OFF",
         "-DHYPRE_BUILD_TESTS=OFF",
     ]
+    if features["mpi"]:
+        # Keep CMake's compiler identity on the host compiler and let FindMPI
+        # interrogate the wrapper.  Treating mpicc itself as CMAKE_C_COMPILER
+        # makes MPI's include path look implicit, so CUDA translation units
+        # compiled by nvcc do not receive mpi.h.
+        options.append(f"-DMPI_C_COMPILER={mpicc}")
     if features["cuda"]:
         options.extend(
             [
@@ -1336,7 +1334,10 @@ def build_mfem(
             f"-DGSLIB_DIR={bundle_root(args, 'include/gslib/gslib.h')}"
         )
     if features["zlib"]:
-        options.append(f"-DZLIB_ROOT={bundle_root(args, 'include/zlib.h')}")
+        zlib_root = bundle_root(args, "include/zlib.h")
+        options.append(f"-DZLIB_ROOT={zlib_root}")
+        if args.host_system == "emscripten":
+            options.append(f"-DZLIB_LIBRARY={zlib_root / 'lib' / 'libz.a'}")
     if features["sundials"]:
         options.append(
             f"-DSUNDIALS_DIR={bundle_root(args, 'include/sundials/sundials_config.h')}"